Need to automatically select region on map based on the 3 circles in attached map.

[nkress]

Hi,

I am new to ArcGIS. I have been tasked with making a python script that will select the regions within the larger circles below.  

So in other words make a selection of everything in the larger green, red, and light blue circles above.  I am not sure if this is even possible so could someone let me know if it is possible and direct me to whatever documentation or other resources I need to review on it to make this happen?

At the moment we are using Arcgis Online but may need to use ArcGIS Pro to make this work?